Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filedfiledCritical
Priority to DD18442675ApriorityCriticalpatent/DD117875A1/xx
Priority to DE19752556728prioritypatent/DE2556728A1/de
Publication of DD117875A1publicationCriticalpatent/DD117875A1/xx
Priority to FR7604966Aprioritypatent/FR2302298A1/fr
Priority to IT4826276Aprioritypatent/IT1053995B/it